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Extensive research into the ecological impacts of bottom trawling has indicated that fishing activities have the ability to significantly change seabed communities. Similarly, research into aggregate extraction has provided an understanding of the impacts on benthic communities within and in the vicinity of aggregate extraction sites. To understand the significance of the impacts caused by aggregate extraction in an area, it is essential to understand the nature and extent of other human activities (e.g. fishing) in the area, as well as how they will impact the seabed environment. To date, little research has been carried out to compare the impacts of bottom trawling and aggregate extraction on benthic communities and the wider ecosystem. This project was developed as a pilot study into the nature and extent of fishing impacts and activities in the Eastern English Channel, which would provide the basis for future research into the significance of the impacts of aggregate extraction compared to bottom trawling activities. Using existing geophysical survey data collected in the Eastern English Channel, a methodology was developed to quantify the seabed impact resulting from bottom trawling activities. Three types of trawl scars could be identified from the sidescan sonar data, and corresponded with scallop dredging, beam trawling and otter trawling. Maps of the density and spatial coverage of the physical impact as a result of these activities are presented in this report.
The Crown Estate
Other details | ||
Internal code | Internally assigned metadata identifier | 7513 |
Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2008, Cefas, Scale and impact of fishing activities in the Eastern English Channel: an initial assessment based on existing geophysical survey data |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | MEPF 07/04 |
File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | b6971032e2d15c7dad1e92e4ddb74798 |
Resource Identifier | This is the code assigned by the data owner. | 20382 |
Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | series |
Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2024-03-29 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2024-03-29 |
Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 1 |
Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m |
Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | Extensive research into the ecological impacts of bottom trawling has indicated that fishing activities have the ability to significantly change seabed communities. Similarly, research into aggregate extraction has provided an understanding of the impacts on benthic communities within and in the vicinity of aggregate extraction sites. To understand the significance of the impacts caused by aggregate extraction in an area, it is essential to understand the nature and extent of other human activities (e.g. fishing) in the area, as well as how they will impact the seabed environment. To date, little research has been carried out to compare the impacts of bottom trawling and aggregate extraction on benthic communities and the wider ecosystem. This project was developed as a pilot study into the nature and extent of fishing impacts and activities in the Eastern English Channel, which would provide the basis for future research into the significance of the impacts of aggregate extraction compared to bottom trawling activities. Using existing geophysical survey data collected in the Eastern English Channel, a methodology was developed to quantify the seabed impact resulting from bottom trawling activities. Three types of trawl scars could be identified from the sidescan sonar data, and corresponded with scallop dredging, beam trawling and otter trawling. Maps of the density and spatial coverage of the physical impact as a result of these activities are presented in this report. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | This project was developed as a pilot study into the nature and extent of fishing impacts and activities in the Eastern English Channel, which would provide the basis for future research into the significance of the impacts of aggregate extraction compared to bottom trawling activities. |
Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | Presentation type: digital representation of a primarily textual item (can contain illustrations also) Spatial representation type: 001 Supply media: 001 Origin: Centre for Environment Fisheries and Aquaculture Science |
Related keywords | ||
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Research |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Research and Development Activity | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Side-scan sonar | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fishing effort | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fishery characterisation | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
Keyword title | MEDIN | |
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
Keyword title | MEDIN | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 49.7672631874 |
East | The eastern-most limit of the data resource in decimal degrees | -7.55719702927 |
South | The southern-most limit of the data resource in decimal degrees | 49.7672598192 |
West | The western-most limit of the data resource in decimal degrees | -7.5572338114 |
Responsible organisations | ||
Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
Organisation name | Centre for Environment Fisheries and Aquaculture Science | |
Position name | Contracts Manager | |
Phone | +44(0)1502562244 | |
Delivery point | Lowestoft Laboratory | |
URL | http://www.cefas.co.uk/ | |
Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
Organisation name | The Crown Estate | |
Phone | +44 020 7851 5000 | |
Delivery point | 16 New Burlington Place | |
Postal code | W1S 2HX | |
City | London | |
Country | United Kingdom | |
URL | http://www.thecrownestate.co.uk | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory | |
Phone | +44 (0)1502 562244 | |
Fax | +44 (0)1502 513865 | |
Delivery point | Pakefield Road | |
Postal code | NR33 OHT | |
Administrative area | Suffolk | |
Country | United Kingdom | |
URL | http://www.cefas.co.uk/ | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/1481/summary |
Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
Dataset constraints | ||
21 Conditions for access and use – Use limitation | Any restrictions imposed on accessing the resource. | no conditions apply |
Available data formats | ||
Data format name | Format in which digital data can be provided for transfer | Government Funded |
Version info | ||
Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2008-03-31 |
Metadata date | The date when the content of this metadata record was last updated. | 2008-03-18 |
Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata Standard |
Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.5 |
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